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0408-BCM270X_DT-Add-spi-rtc-overlay-on-SPI0.0.patch

0408-BCM270X_DT-Add-spi-rtc-overlay-on-SPI0.0.patch 2.1 KB
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  1. From 6790d3a4683d7e2e6e0fe1bbc7ab856f23e37885 Mon Sep 17 00:00:00 2001
    2. 

  2. From: Thomas Kriechbaumer <thomas@kriechbaumer.name>
    3. 

  3. Date: Fri, 3 Jun 2016 09:40:44 +0200
    4. 

  4. Subject: [PATCH] BCM270X_DT: Add spi-rtc overlay on SPI0.0
    5. 

  5. 

  6. Initial version only supports PCF2123 RTC.
    7. 

  7. 

  8. See: https://github.com/raspberrypi/linux/pull/1510
    9. 

  9. ---
    10. 

  10.  arch/arm/boot/dts/overlays/Makefile            |  1 +
    11. 

  11.  arch/arm/boot/dts/overlays/README              |  6 +++++
    12. 

  12.  arch/arm/boot/dts/overlays/spi-rtc-overlay.dts | 33 ++++++++++++++++++++++++++
    13. 

  13.  3 files changed, 40 insertions(+)
    14. 

  14.  create mode 100644 arch/arm/boot/dts/overlays/spi-rtc-overlay.dts
    15. 

  15. 

  16. --- a/arch/arm/boot/dts/overlays/Makefile
    17. 

  17. +++ b/arch/arm/boot/dts/overlays/Makefile
    18. 

  18. @@ -78,6 +78,7 @@ dtbo-$(RPI_DT_OVERLAYS) += smi.dtbo
    19. 

  19.  dtbo-$(RPI_DT_OVERLAYS) += smi-dev.dtbo
    20. 

  20.  dtbo-$(RPI_DT_OVERLAYS) += smi-nand.dtbo
    21. 

  21.  dtbo-$(RPI_DT_OVERLAYS) += spi-gpio35-39.dtbo
    22. 

  22. +dtbo-$(RPI_DT_OVERLAYS) += spi-rtc.dtbo
    23. 

  23.  dtbo-$(RPI_DT_OVERLAYS) += spi1-1cs.dtbo
    24. 

  24.  dtbo-$(RPI_DT_OVERLAYS) += spi1-2cs.dtbo
    25. 

  25.  dtbo-$(RPI_DT_OVERLAYS) += spi1-3cs.dtbo
    26. 

  26. --- a/arch/arm/boot/dts/overlays/README
    27. 

  27. +++ b/arch/arm/boot/dts/overlays/README
    28. 

  28. @@ -975,6 +975,12 @@ Load:   dtoverlay=spi-gpio35-39
    29. 

  29.  Params: <None>
    30. 

  30.  
    31. 

  31.  
    32. 

  32. +Name:   spi-rtc
    33. 

  33. +Info:   Adds support for a number of SPI Real Time Clock devices
    34. 

  34. +Load:   dtoverlay=spi-rtc,<param>=<val>
    35. 

  35. +Params: pcf2123                 Select the PCF2123 device
    36. 

  36. +
    37. 

  37. +
    38. 

  38.  Name:   spi1-1cs
    39. 

  39.  Info:   Enables spi1 with a single chip select (CS) line and associated spidev
    40. 

  40.          dev node. The gpio pin number for the CS line and spidev device node
    41. 

  41. --- /dev/null
    42. 

  42. +++ b/arch/arm/boot/dts/overlays/spi-rtc-overlay.dts
    43. 

  43. @@ -0,0 +1,33 @@
    44. 

  44. +/dts-v1/;
    45. 

  45. +/plugin/;
    46. 

  46. +
    47. 

  47. +/ {
    48. 

  48. +	compatible = "brcm,bcm2708";
    49. 

  49. +
    50. 

  50. +	fragment@0 {
    51. 

  51. +		target = <&spidev0>;
    52. 

  52. +		__dormant__ {
    53. 

  53. +			status = "disabled";
    54. 

  54. +		};
    55. 

  55. +	};
    56. 

  56. +
    57. 

  57. +	fragment@1 {
    58. 

  58. +		target = <&spi0>;
    59. 

  59. +		__dormant__ {
    60. 

  60. +			#address-cells = <1>;
    61. 

  61. +			#size-cells = <0>;
    62. 

  62. +			status = "okay";
    63. 

  63. +
    64. 

  64. +			rtc-pcf2123@0 {
    65. 

  65. +				compatible = "nxp,rtc-pcf2123";
    66. 

  66. +				spi-max-frequency = <5000000>;
    67. 

  67. +				spi-cs-high = <1>;
    68. 

  68. +				reg = <0>;
    69. 

  69. +			};
    70. 

  70. +		};
    71. 

  71. +	};
    72. 

  72. +
    73. 

  73. +	__overrides__ {
    74. 

  74. +		pcf2123 = <0>, "=0=1";
    75. 

  75. +	};
    76. 

  76. +};
    77.